Drill



C. H. DOCKHANI.

Patented J une 20, 1922.

z SHEETS-SHEET 1.

c.H.D0cKHAM.

DRILL.

APPLLCA'I'ION FILED GCT. 9; 1920.

l ,420 1 7 f Patented June 20, 1922.

2 SHEETS-SHEETZ.

fbx/44. i me/w subject to injury and UNITED STATES PATENT CLARENCE H. noCxHAi/i, 0E CLEVELAND, omo, AssieNoE To CHICAGO PNEUMATIC 'iooL COMPANY, 0E NEW Yonx, N. Y., A CCEEoRATIoN 0E NEW'JEESEY,

DRILL.

Patented June so, 1922.

Application filed October' 9, 1920. lSerial No. 415,868.

To all whom t may concern.' Y

Be it knownn that I, CLARENCE H'. DOCK- HAM, a citizen of the 'United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Drills, of which the following is a specification.

My invention relates to drills of the type frequently referred to as rock drills, and the object-thereof is to provide a novel and eflicient mounting for the drill proper. Heretofore the mounting of the drill has consisted of a rigid shell having guideways on which the machine is adapted to slide, but owingto its rigidity this mounting is breakage from the strains and stresses vresulting fromI the operation of the drill. Moreover, this shell provides an... insufficient bearing for the drill structure and also lrequires frequent adjustment.

My present mounting overcomes these objections and provides a supporting structure which provides elasticity and yet suficient rigidity for all practical working purposes, and also provides ample bearing for 4the drill and avoids necessityA of adjustment of any guideways. In my con-- struction I also provide for Van adjustable cone in connection with said mountinof.

In the drawings Fig. 1 is a side e evation of a drilling machine embodying my invention; Fig. 2 a plan view thereof showing the drill proper removed; Fig. 3 a section on the line 3--3 of Fig. 1 but on a larger scale; and Figs. 4, 5 and 6 cross sections on the corresponding section lines of Fig. 2 but on a larger scale. Referring to the present embodimentof my invention as herein shown, the drilling machine comprises three main parts, to-Wit: the drill proper, the mounting therefor and the cone adjustable on the mounting. The drill proper, which is indicated 4at 1, is here of the hand or portable type adapted to be removably secured or clamped upon the mounting in the manner hereinafter explained in detail.

The mounting comprises a frame consisting of four longitudinal members, preferab y tubes 2-which are spaced or arran ed in pairs as indicated in the drawings. he ends of these tubes are secured together in suitable manner as by m'eans of plates 3 upper end thereof as clearly shown in and bolts or studs 4, thellatter being anchored into the ends of the tubes by screwing thereinto and having bolts 5 at their.

outer ends, as shown in detail in Fig.` 3.- The usual feed screw' is arranged substantially centralof this mounting frame and has its bearings at opposite ends in the end plates 3.

The mounting also comprises-two cross heads slidable upon said mounting and adapted to carry the drill proper. A s shown the rear cross head 7 has lateral portions 8 8 provided with openings through which pass the upper pair of tubes 2with the result that the cross head has an efficient bearing to the extent of the entire circumference of these two tubes. This rear cross head is also provided with a sleeve nut 9 having screw threaded connection with the feed screw 6. As shown in Fig. 6, this sleeve nut is removably held ina longitudinal bore in this cross head by a nut 30 screwing onto the forward end of the sleeve nut, the head 'of the sleeve nut contacting the rear face of the cross head.

The cross head 7 is further provided with a rearwardly extending plate' 10 to which is adjustably secured a bracket or cradle 11 adapted to receive and lli'old the handle portion 12 of the drill. The bracket is adjustable on the plate 10 by reason of the provision of the bolt 13 screwing into plate and the slot 14 therein, Fig. 6.

The front cross head 15 is provided with and on its upper side with a curved saddle' portion 19 adapted to receive the forward portion of the drill proper which is clamped thereto in the following manner The curved clamping member 2O is pivoted at 21 to one side of the cross head 15 and at Fthe i 4J The clampingmember is of such cofiformation on its inner` side as'to fit the tour of the drill upon which it presses. vThe free end of this clamping member is provided wi'th an outwardly `extending lug 22 adapted to receive the drill which is slotted from its outer end to receive the swinging clamping bolt 23 which is pivoted at 24 to the opposite upper end of the cross head l5. This bolt is provided with a nut25 for securing the same in place when the drill is clamped in position on the mounting.

rlhe cone consists of a body portion '26v and four tubular extensions 2.7 arranged in pairs with the members of each pair in axial alignment and adapted to receive ,and be slidable upon the lower pair of tubes 2. The cone is adjustable on these tubes, preferably by means of the slit tube28 arranged between two members of one pair of said eX- tensions 27 and adapted'to be clamped upon one of the tubes 2 by means of bolt 29,

rlhere is thus provided a comparatlvely simple but eilicient mounting which is capable of-v elastic or weaving action which takes care of the strains and stresses without interfering with the practical operation of the drill and without resulting in any injury to or breakage of the mounting or any other parts of the drilling machine. Moreover l provide a simple and eiiicient cone structure so related to the mounting that it can be readily adjusted to any de; sired position with respect to such mounting. Although I prefer to use round, hollow rods for the skeleton frame, solid rods and rods of other than round form may be used.

ll claim:

. y 1. A drill mounting comprising aframe consisting o'f two pairs of arallel rods connected together at their en s, and cross heads proper and mounted on such frame.

2. A drill mounting comprising a frame consisting of two pairs of parallel hollow rods connected together at their ends, and cross heads adapted to receive the drill proper and adjustably mounted on such frame.

3. A drill mounting co prising a frame consisting of pairs of ro s connected together at their ends, cross heads slidably mounted on the upper pair of rods, and a supporting device mounted on the lower pair of rods.

4. A drill mounting comprising a frame consisting of pairs of rods. end plates for securing the ends of such' rods together, a feed screw having bearingsin such plates and arranged substantially centrally of such frame, and cross heads adapted to receive the'drill proper and slidably mounted on such frame.

5. A drill mounting comprising a frame consisting of two pairs of parallel rods con nected together at their ends, a cross head adapted to receive'the drill proper and having openings through which a pair of such rods pass whereby the cross headmay slide on the frame and a feed screw located within Said` frame and parallel to the rods and cooperating with the cross head.

6. A drill mounting comprising a frame consisting of a pluralityA of rods connected together at their ends, a pair of cross heads connected together and adapted to receive the drill proper, said heads having openings through which a pair of such rods pass whereby the cross heads may slide on the frame and a lfeed screw located -within said frame and parallel to the rods and cooperating with the cross head.

7. A drill mounting 'comprising a frame consisting of a plurality of rods connected together at their ends, and a pair of cross heads connected together and adapted to receive the drill proper, said heads having openings through which a pair of such rods pass whereby the cross heads may slide on the frame, and a feed screw supported in suchframe and adapted to engage one of the crossheads. l

8. A drill mounting comprising a frame consisting of two pairs of parallel rods connected together at their ends, and a pair of cross heads connected together and ada ted to receive the drill proper, said heads aving openings through which a pair of such rods pass whereby the cross heads may slide on the frame, one of the cross heads having an adjustable cradle adapted to receive the handle end of the drill and a feed screw cooperating with the latter head and located in the interior of said frame.

9. A drillmounting comprising a frame vconsisting of a plurality of rods connected together at their ends, land a pair of cross heads connected together and adapted to -receive the drill proper, said heads having openings through which a pair of such rods pass whereby the cross heads may slide on the frame, one of the cross heads having a saddle portion and a clamping member adapted to engage the drill proper and hold it anchored to the saddle and a feed screw cooperating with the latter head and located in the interior of said frame.

10. A drill mounting comprising a frame consisting of a plurality of rods connected together at their ends, and a pair of cross heads connected together and adapted to receive the drill proper, a feed screw located within said frame and cooperating with one of the heads, said heads having openings through which a pair of? such rods pass whereby the cross heads may slide on the frame, one of the cross heads having a saddle portion and a clamping member adapted to engage the drill proper and hold it anchored to the saddle` such member being pivoted to one side of the cross head and a swinging bolt on the other side thereof to engage the free end of the clamping member.

11. A drill mounting comprising a frame consisting of a plurality of pairs of rods slidably mounted on one pair of such rods,-

connected together at their ends, cross headsv slidably mounted on one pair of such rods, and a cone having tubular extensions mounted on the other pair of such rods.

12. A drill mounting comprisingxa frame consisting of a plurality of pairs of rods connected together-'at their ends, cross heads cone having tubular extensions mounted on the other pair of such rods, and means for securing the cone in adjusted position thereon.

13. A drill mounting com rising 'a frame consisting of a plurality 'o pairs of rods connected together at their ends, cross heads a cone havingl two pairs of tubular exten'- jsions, the members of each ipairjbeing `justed position thereon. v

14. A.A drill mounting comprising la frame consisting of a plurality of pairs of rods connected together at their ends, cross heads slidably mountedon one pair of such rods, slidably mounted on one pair of such rods, al

afcone having two pairs of tubular extensions, the membersof each pair being mounted to slide on thether pair of' such rods, and means for securing the co-ne in4 adjusted position thereon, such means comprising'a clamping collar arranged between the members of one pair-of such extenslons and adapted to be clamped to the rod which passes through such particular extensions.

CLARENCE DooKHAM.l 

